HIGH VOLTAGE POWER SUPPLY
First Claim
1. A high voltage D.C. power supply comprising means for providing an alternating input voltage of predetermined amplitude, means for rectifying said alternating input voltage, means for regulating said rectified voltage, and means for filtering said regulated and rEctified voltage, said filtering means including an output filter capacitor, a zener diode connected between said regulator means and said output capacitor and adapted to clamp said output capacitor to the peak voltage across said regulator means and thereby to increase the filtering effect of said capacitor, and a bleeder resistor connected to provide a discharge path for said capacitor only through the zener impedance of said clamping zener diode when said alternating input voltage is interrupted, whereby said clamping zener diode allows said bleeder resistor to be positioned to provide a discharge path for said output capacitor and so that said bleeder resistor does not substantially reduce the filtering effect of said clamping zener diode and said output capacitor.
1 Assignment
0 Petitions
Accused Products
Abstract
A high voltage power supply having a clamping zener diode in series between a regulating zener diode and an output filter capacitor to clamp the capacitor to the peak voltage across the regulating zener diode. A bleeder resistor across the regulating zener diode provides a discharge path for the output capacitor through the zener impedance of the clamping zener diode when the supply is turned off.
9 Citations
2 Claims
-
1. A high voltage D.C. power supply comprising means for providing an alternating input voltage of predetermined amplitude, means for rectifying said alternating input voltage, means for regulating said rectified voltage, and means for filtering said regulated and rEctified voltage, said filtering means including an output filter capacitor, a zener diode connected between said regulator means and said output capacitor and adapted to clamp said output capacitor to the peak voltage across said regulator means and thereby to increase the filtering effect of said capacitor, and a bleeder resistor connected to provide a discharge path for said capacitor only through the zener impedance of said clamping zener diode when said alternating input voltage is interrupted, whereby said clamping zener diode allows said bleeder resistor to be positioned to provide a discharge path for said output capacitor and so that said bleeder resistor does not substantially reduce the filtering effect of said clamping zener diode and said output capacitor.
-
2. A power supply as claimed in claim 1 wherein said regulator means includes a regulating zener diode, said bleeder resistor being connected across said regulating zener diode, and said clamping zener diode being connected in series between said regulating zener diode and bleeder resistor and said output capacitor and having a zener breakdown voltage greater than the peak-to-peak value of the A.C. component of voltage across said regulating zener diode.
Specification